I'm using Multisite, Marketpress, and Pro Sites. I'd like to know how to set up a commission system so that everyone who has a store on my website can pay me commission for their sales. Can someone please tell me how to do this with the applications listed? I've been scouring the internet for articles on how to do this, and I just can't find anything useful. Please help!
Thank you very much for any assistance which you may provide.